CN110271384A - pure electric vehicle air conditioner control system and method - Google Patents
pure electric vehicle air conditioner control system and method Download PDFInfo
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- CN110271384A CN110271384A CN201910501313.8A CN201910501313A CN110271384A CN 110271384 A CN110271384 A CN 110271384A CN 201910501313 A CN201910501313 A CN 201910501313A CN 110271384 A CN110271384 A CN 110271384A
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- switch
- air
- blower
- conditioning
- condenser fan
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
- B60H1/2218—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters controlling the operation of electric heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a pure electric vehicle air conditioner control system which comprises a condenser fan relay, a condenser fan motor, a vehicle control unit, a bidirectional pressure switch, a temperature control amplifier, an air conditioner switch, a blower relay, a blower, a PTC heater switch, a temperature control switch in a warm air core body and a blower switch, wherein the condenser fan relay is connected with the condenser fan motor; the air conditioner compressor start-stop control loop is formed by connecting an air blower switch, an air conditioner switch, an evaporator surface temperature control amplifier and a bidirectional pressure switch in series, and sends an air conditioner compressor start-up request signal to a VCU when the air blower is turned on, the air conditioner switch is turned on, the temperature control switch is turned on and the bidirectional pressure switch is turned on, so that only one loop is needed to be directly connected to the VCU from the air blower switch of a cab through an A/C switch, a temperature controller and the bidirectional pressure switch, the length of a wiring harness is reduced in the early stage of meeting a control strategy, VCU interfaces are reduced, and the cost is reduced.
Description
Technical field
The present invention relates to car air-conditioner control technology fields, in particular to a kind of pure electric automobile air conditioning control system and side
Method.
Background technique
With the energy, environmental problem it is increasingly serious, new-energy automobile obtains booming, pure electric vehicle light commercial vehicle
It plays an important role in terms of City Logistics Transportation, environmental sanitation, and pure electric vehicle light commercial vehicle is fired relative to tradition
The oily entire dynamical system of vehicle is entirely different, therefore great variety also has occurred in air-conditioning system, and conventional fuel oil car is air conditioner compressed
Machine relies on and the belt pulley of engine crankshaft one drives compressor of air conditioner rotation acting to carry out compression refrigerant, and the start and stop of compressor are logical
Electromagnetic clutch inside overcompression machine belt pulley is realized to connect, cut off power transmission.And pure electric vehicle light commercial vehicle because
For not traditional internal combustion engine instead battery, motor, automatically controlled, it is therefore desirable to realize pressure by motor compressor
Contracting refrigerant, meanwhile, conventional internal combustion locomotive driver's cabin warm wind takes the heat in engine cylinder body to by engine-cooling system
Driver's cabin blows into driver's cabin by air blower, and pure electric vehicle light commercial vehicle is because without internal combustion engine the heat of its warm wind comes
Source is realized by the electric heating device inside air-conditioning box, for above-mentioned variation, the entire air-conditioning control of pure electric vehicle light commercial vehicle
The control principle of system processed will be redesigned according to the characteristic of pure electric vehicle.
Existing pure electric automobile air conditioning system, VCU (entire car controller) acquisition air-conditioning A/C switching signal, air conditioning pressure are opened
OFF signal, evaporator temperature signal, wind velocity signal form control signal by calculation process, are transferred to by CAN bus electronic
Compressor, by the on-off of motor compressor control compressor of air conditioner high-tension circuit, because entire car controller is typically located at vehicle frame
On, and the switch of air-conditioning system, sensor cause harness excess-length, increased costs, while air-conditioning system substantially all in driver's cabin
All switches, sensor, which all meet VCU, leads to the increase of VCU hardware interface.
Summary of the invention
Present invention aim to provide a kind of pure electric automobile air conditioning control system and method, the present invention only to need one
Circuit begins to pass through A/C switch, temperature controller, two-way pressure switch directly to VCU from driver's cabin blower switch, controls meeting
Make harness length reduction under the premise of strategy, VCU interface is reduced, and cost reduces.
In order to achieve this, a kind of pure electric automobile air conditioning control system designed by the present invention, it includes condenser wind
Fan relay, condenser fan motor, entire car controller, two-way pressure switch, temperature-control amplifier, air-conditioning switch, air blower after
Electric appliance, air blower, ptc heater switch, heater cores inside temperature detect switch (TDS), blower switch and motor compressor；
Wherein, one end of the normally opened contact of the feeder ear connection condenser fan relay of condenser fan motor, condensation
The normal electric feeder ear of the other end access battery of the normally opened contact of device cooling fan relay, the one of condenser fan relay coil
The other end of the normally opened contact of end connection condenser fan relay, the other end of condenser fan relay coil connect vehicle
The condenser fan control signal output of controller, the sky of the control signal input connection entire car controller of motor compressor
Adjust compressor enable signal output end, the normal electric feeder ear of the power end access battery of motor compressor；
The signal input part of the output end connection temperature-control amplifier of air-conditioning switch, the signal output end connection of temperature-control amplifier
One end of two-way pressure switch, the compressor of air conditioner work request signal of the other end connection entire car controller of two-way pressure switch
Input terminal, the power interface of temperature-control amplifier access car key switch IG2 power supply, and the input terminal of air-conditioning switch connects air blower
The other end of one end of relay coil, air blower relay coil accesses car key switch IG2 power supply, air blower relay
The positive pole of one end connection air blower of normally opened contact, the other end of air blower relay normally open contact access the normal of battery
Electric feeder ear is provided with blower switch, the anode of air blower between the cathode interface of air blower and the input terminal of air-conditioning switch
Interface connects one end of ptc heater switch, the one of temperature detect switch (TDS) inside the other end connection heater cores of ptc heater switch
Request signal input terminal is opened in the PTC heating at end, the other end connection entire car controller of heater cores inside temperature detect switch (TDS).
In the present invention, VCU receives air-conditioning request signal (low level), while receiving high pressure accessory contact device and (being located at HCM
Control box inside) be closed bus signals after, at this time VCU by low side control condenser fan relay closure (receiving sky
It tunes to open after opening request signal while determining that high pressure accessory contact device is closed two conditions, just exports condenser fan control and pressure
Contracting machine is enabled), condenser fan starts rotation and guarantees that the heat dissipation of air-conditioning system is normal, while exporting the enabled letter of motor compressor
Number, air-conditioner controller controls compressor operating after receiving effective enable signal.
In the present invention, PTC heats unlocking condition are as follows: blower opening, PTC are closed the switch and temperature detect switch (TDS) on heater cores
Closure, after meeting conditions above, VCU receives PTC heating and opens request signal, and VCU sends PTC heating to HCM control box and connects
Tentaculum close request bus signals, so that controller PTC contactor is closed, air blower blows out the heat of heater cores.
Compared with prior art, the invention has the following advantages:
The present invention comprehensively considers the principle that above-mentioned compressor of air conditioner unlocking condition redesigns air-conditioning system, compressor of air conditioner
Start-up and shut-down control circuit is by blower switch, air-conditioning A/C switch, evaporator surface temperature-control amplifier, two-way pressure switch series connection group
At blower opening, A/C are closed the switch, temperature detect switch (TDS) is closed (evaporator surface temperature is in normal threshold values), bidirection press is opened
It closes and closes (coolant charging amount is within the specified scope), open request signal to send compressor of air conditioner to VCU, therefore only need one
Root circuit begins to pass through A/C switch, temperature controller, two-way pressure switch directly to VCU from driver's cabin blower switch, controls meeting
Making makes harness length reduction under the early period of strategy, VCU interface is reduced, and cost reduces.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1-condenser fan relay, 2-condenser fan motors, 3-entire car controllers, 4-bidirection press
Switch, 5-temperature-control amplifiers, 6-air-conditioning switch, 7-air blower relays, 8-air blowers, 9-ptc heaters switch,
Temperature detect switch (TDS), 11-blower switches, 12-warm wind voltage reduction modules, 13-motor compressors inside 10-heater cores.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
A kind of pure electric automobile air conditioning control system that the present invention designs, as shown in Figure 1, it includes condenser fan relay
Device 1, condenser fan motor 2, entire car controller 3, two-way pressure switch 4, temperature-control amplifier 5, air-conditioning switch 6, air blower after
Electric appliance 7, air blower 8, ptc heater switch 9, heater cores inside temperature detect switch (TDS) 10, blower switch 11 and motor compressor
13；
Wherein, one end of the normally opened contact of the feeder ear connection condenser fan relay 1 of condenser fan motor 2, it is cold
The normal electric feeder ear of the other end access battery of the normally opened contact of condenser fan relay 1,1 coil of condenser fan relay
One end connection condenser fan relay 1 normally opened contact the other end, the other end of 1 coil of condenser fan relay connects
The condenser fan control signal output of entire car controller 3 is connect, the control signal input of motor compressor 13 connects vehicle
The compressor of air conditioner enable signal output end of controller 3, the normal electric feeder ear of the power end access battery of motor compressor 13；
The signal input part of the output end connection temperature-control amplifier 5 of air-conditioning switch 6, the signal output end of temperature-control amplifier 5
Connect one end of two-way pressure switch 4, the compressor of air conditioner work of the other end connection entire car controller 3 of two-way pressure switch 4
The power interface of request signal input terminal, temperature-control amplifier 5 accesses car key switch IG2 power supply, the input terminal of air-conditioning switch 6
One end of 7 coil of air blower relay is connected, the other end of 7 coil of air blower relay accesses car key switch IG2 power supply,
7 normally opened contact of air blower relay one end connection air blower 8 positive pole, 7 normally opened contact of air blower relay it is another
The normal electric feeder ear into battery is terminated, is provided with air blower between the cathode interface of air blower 8 and the input terminal of air-conditioning switch 6
Switch 11, one end of the anode interface connection ptc heater switch 9 of air blower 8, the other end connection of ptc heater switch 9 are warm
One end of temperature detect switch (TDS) 10 inside wind core, the PTC of the other end connection entire car controller 3 of heater cores inside temperature detect switch (TDS) 10
Request signal input terminal is opened in heating.
In above-mentioned technical proposal, the two-way pressure switch 4 incudes the refrigerant pressure in air conditioning for automobiles refrigerant pipeline, and by
Refrigerant pressure in air conditioning for automobiles refrigerant pipeline controls on-off, when refrigerant pressure is greater than preset upper pressure limit value or is less than pre-
If low pressure limit value when, two-way pressure switch 4 disconnect.
In above-mentioned technical proposal, entire car controller 3 sends PTC also contacts device close request bus letter to HCM control box
Number, so that controller PTC (thermistor) contactor is closed, air blower 8 blows out the heat of heater cores.
In above-mentioned technical proposal, warm wind decompression is provided between the cathode interface and blower switch 11 of the air blower 8
Module 12, the warm wind voltage reduction module 12 include resistance R1, resistance R2 and resistance R3, and wherein one end of resistance R1 connects air blower
One grade of contact point of switch 11, two grades of contact points of one end connection blower switch 11 of resistance R2, one end connection of resistance R3
The third gear contact point of blower switch 11, the cathode interface of air blower 8 are directly connected to four gear contact points of blower switch 11, electricity
One end of the other end connection connection resistance R2 of R1 is hindered, one end of the other end connection resistance R3 of resistance R2, resistance R3's is another
The cathode interface of end connection air blower 8, the input terminal of the electrical energy inputs H1 connection air-conditioning switch 6 of blower switch 11, air blast
The switch ground terminal of machine switch 11 is grounded.Three resistance are placed inside warm wind voltage reduction module 12 and realize 4 grades of speed regulation, and speed adjusting resistance connects
Blower switch is connect, 1/2/3/4 grade of output line of speed adjusting resistance connects 1/2/3/4 grade of input line of blower switch, adjusts air blast
The knob of machine switch realizes that 1/2/3/4 grade of input line is connect with vehicle body cathode, while the signal input part and drum of air-conditioning A/C switch
One end of fan coil is also grounded, in blower switch by OFF to 1/2/3/4 any gear when, air blower cathode, air blower after
Electric apparatus coil cathode, air-conditioning A/C switching signal are simultaneously also by blower switch inner ground.
In above-mentioned technical proposal, the other end of the normally opened contact of condenser fan relay 1 is stored by fuse P1 access
The normal electric feeder ear of battery.
In above-mentioned technical proposal, the air-conditioning A/C switch work light power interface of the air-conditioning switch 6 and temperature control amplification
The power interface of device 5 passes through fuse P2 after being connected and accesses car key switch IG2 power supply.
In above-mentioned technical proposal, the other end of 7 coil of air blower relay accesses car key by fuse P4
Switch IG2 power supply；
The other end of 7 normally opened contact of air blower relay accesses the normal electric feeder ear of battery by fuse P3.
The course of work of the invention are as follows: compressor of air conditioner start-up and shut-down control circuit is by blower switch 11, air-conditioning switch 6, temperature
Control amplifier 5, two-way pressure switch 4 are composed in series, as shown in Figure 1, blower switch 11 is to be divided into fourth gear (L/ML/MH/H),
When blower switch opens (non-OFF position), the electrical energy inputs H1 of blower switch 11 is grounded by blower switch 11,
Air blower relay 7 is closed at this time, and air blower 8 is grounded by warm wind voltage reduction module 12, blower switch 11, and air blower 8 starts
Work.At this point, air-conditioning switch 6 is pressed, which is self-locking non-reset formula switch, and switch internal contact is normally closed.
Temperature-control amplifier 5 prevents evaporator surface from freezing, the device is by being located at evaporation for detecting evaporator surface temperature
The temperature-sensitive head (NTC negative temperature coefficient resister) on device surface and the control circuit composition on air-conditioning box, when evaporator surface temperature
When degree is lower than 3.5 DEG C, negative-positive-negative transistor shutdown is driven by 5 internal amplification circuit of temperature-control amplifier, at this point, temperature control is put
The signal output end and A/C pressure switch output end of big device 5 disconnect, when evaporator surface temperature is higher than 6 DEG C, temperature control amplification
5 crystal inside triode of device closure；
Whether the pressure that air-conditioning duct two-way pressure switch is used to detect air-conditioning duct refrigerant R134a is normal, when pressure mistake
When low (as do not filled refrigerant), prevent compressor from dallying, two-way pressure switch 4 disconnects at this time, the signal output of temperature-control amplifier 5
End and the compressor of air conditioner work request signal input part of entire car controller 3 disconnect, when (such as refrigerant adds air-conditioning duct hypertonia
Note is excessive, air-conditioning duct blocks), to prevent overheat of compressor from damaging, two-way pressure switch 4 is also to disconnect at this time, only free
Adjust pipeline refrigerant pressure two-way pressure switch 4 in defined critical field that could be closed, at this point, the signal of temperature-control amplifier 5
The compressor of air conditioner work request signal input part of output end and entire car controller 3 is connected；
When key is in ON grades, vehicle high pressure attachment (motor compressor, DC-DC, steering pump etc.) completes preliminary filling, high
Accessory contact device closure is pressed, while entire car controller 3 receives compressor of air conditioner work request signal (low side signals), it is believed that drive
The person of sailing requests to open electric air-conditioning, and entire car controller 3 controls condenser fan relay 1 and is closed at this time, condenser fan motor 2
It starts running, while entire car controller 3 exports compressor of air conditioner enable signal, the motor compressor controller of motor compressor 13
Permanent magnet synchronous motor operating is controlled, refrigerant starts to flow in air-conditioning duct.
When compressor of air conditioner work request invalidating signal (hanging, flash), the stopping compressor of entire car controller 3 enables defeated
Out, the motor compressor controller control motor compressor of motor compressor 13 shuts down before the deadline, but at this time
It still keeps condenser fan relay 1 to be closed, condenser fan motor 2 is made to remain in operation, entire car controller 3 closes after the 10S that is delayed
Condenser fan relay control is closed, condenser fan motor 2 shuts down, and guarantees to stop working in compressor of air conditioner with this
Afterwards, the pressure of air-conditioning duct can normally discharge.
PTC start-up and shut-down control circuit is composed in series by temperature detect switch (TDS) 10 inside PTC switch 9, heater cores, when air blower works
Blower power supply is high level afterwards, if PTC switch 9 is pressed at this time, the conducting of switch internal contact；Temperature detect switch (TDS) inside heater cores
10 be bimetallic sheet structure, and when PTC surface temperature is excessively high, bimetal leaf is disconnected, if opposite PTC surface temperature is normal, is connect
Logical, the PTC heating unlatching request signal input terminal of entire car controller 3 receives high level signal and then thinks driver requested unlatching
PTC heating, to send PTC contactor closure bus signals, request HCM controller is closed PTC contactor, and HCM closure PTC connects
Tentaculum, PTC start to work.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (8)
1. a kind of pure electric automobile air conditioning control system, it is characterised in that: it includes condenser fan relay (1), condenser
Fan motor (2), entire car controller (3), two-way pressure switch (4), temperature-control amplifier (5), air-conditioning switch (6), air blower after
Electric appliance (7), air blower (8), ptc heater switch (9), temperature detect switch (TDS) (10) inside heater cores, blower switch (11) and
Motor compressor (13)；
Wherein, one end of the normally opened contact of feeder ear connection condenser fan relay (1) of condenser fan motor (2), it is cold
The normal electric feeder ear of the other end access battery of the normally opened contact of condenser fan relay (1), condenser fan relay (1)
The other end of the normally opened contact of one end connection condenser fan relay (1) of coil, condenser fan relay (1) coil
The other end connects the condenser fan control signal output of entire car controller (3), and the control signal of motor compressor (13) is defeated
Enter the compressor of air conditioner enable signal output end of end connection entire car controller (3), the power end of motor compressor (13), which accesses, to be stored
The normal electric feeder ear of battery；
The signal input part of output end connection temperature-control amplifier (5) of air-conditioning switch (6), the signal output of temperature-control amplifier (5)
One end of end connection two-way pressure switch (4), the air-conditioning pressure of other end connection entire car controller (3) of two-way pressure switch (4)
The power interface of contracting machine work request signal input part, temperature-control amplifier (5) accesses car key switch IG2 power supply, and air-conditioning is opened
One end of input terminal connection air blower relay (7) coil of (6) is closed, the other end of air blower relay (7) coil accesses vehicle
Key switch IG2 power supply, the positive pole of one end connection air blower (8) of air blower relay (7) normally opened contact, air blower
The normal electric feeder ear of the other end access battery of relay (7) normally opened contact, the cathode interface and air-conditioning switch of air blower (8)
(6) it is provided between input terminal blower switch (11), the anode interface connection ptc heater switch (9) of air blower (8)
One end, ptc heater switchs one end of temperature detect switch (TDS) (10) inside the other end connection heater cores of (9), inside heater cores
Request signal input terminal is opened in the PTC heating of other end connection entire car controller (3) of temperature detect switch (TDS) (10).
2. pure electric automobile air conditioning control system according to claim 1, it is characterised in that: the two-way pressure switch
(4) incude the refrigerant pressure in air conditioning for automobiles refrigerant pipeline, and controlled by the refrigerant pressure in air conditioning for automobiles refrigerant pipeline logical
Disconnected, when refrigerant pressure is greater than preset upper pressure limit value or is less than preset low pressure limit value, two-way pressure switch (4) is disconnected
It opens.
3. pure electric automobile air conditioning control system according to claim 1, it is characterised in that: entire car controller (3) is to HCM
It controls box and sends PTC also contacts device close request bus signals, so that controller PTC contactor is closed, air blower (8) will be warmed up
The heat of wind core is blown out.
4. pure electric automobile air conditioning control system according to claim 1, it is characterised in that: the air blower (8) is born
It is provided between pole interface and blower switch (11) warm wind voltage reduction module (12), the warm wind voltage reduction module (12) includes resistance
R1, resistance R2 and resistance R3, wherein one end of resistance R1 connects one grade of contact point of blower switch (11), one end of resistance R2
Connect two grades of contact points of blower switch (11), the third gear contact point of one end connection blower switch (11) of resistance R3, drum
The cathode interface of blower (8) is directly connected to four gear contact points of blower switch (11), the other end connection connection electricity of resistance R1
One end of R2, one end of the other end connection resistance R3 of resistance R2 are hindered, the cathode of other end connection air blower (8) of resistance R3 connects
Mouthful, the input terminal of the electrical energy inputs H1 connection air-conditioning switch (6) of blower switch (11), the switch of blower switch (11) connects
Ground terminal ground connection.
5. pure electric automobile air conditioning control system according to claim 1, it is characterised in that: condenser fan relay
(1) other end of normally opened contact accesses the normal electric feeder ear of battery by fuse P1.
6. pure electric automobile air conditioning control system according to claim 1, it is characterised in that: the air-conditioning switch (6)
Air-conditioning A/C switch work light power interface is accessed after being connected with the power interface of temperature-control amplifier (5) by fuse P2
Car key switch IG2 power supply.
7. pure electric automobile air conditioning control system according to claim 1, it is characterised in that: the air blower relay
(7) other end of coil accesses car key switch IG2 power supply by fuse P4；
The other end of air blower relay (7) normally opened contact accesses the normal electric feeder ear of battery by fuse P3.
8. a kind of pure electric automobile air conditioning control method of system described in claim 1, which is characterized in that it includes following step
It is rapid:
Step 1: when blower switch (11) are opened, the electrical energy inputs of blower switch (11) pass through blower switch (11)
Ground connection, air blower relay (7) is closed at this time, and air blower (8) is connect by warm wind voltage reduction module (12), blower switch (11)
Ground, air blower (8) is started to work, at this point, air-conditioning switch (6) is pressed, which is self-locking non-reset formula switch, switch internal touching
Point is normally closed；
Step 2: temperature-control amplifier (5) detects evaporator surface temperature, prevents evaporator surface from freezing, when evaporator surface temperature
When lower than preset value, negative-positive-negative transistor shutdown is driven by temperature-control amplifier (5) internal amplification circuit, at this point, temperature control is put
The signal output end and A/C pressure switch output end of big device (5) disconnect, when evaporator surface temperature is higher than preset temperature, temperature
Control amplifier (5) crystal inside triode closure；
Step 3: whether the pressure of two-way pressure switch (4) the detection air-conditioning duct refrigerant of air-conditioning duct is normal, when pressure is lower than
When low pressure threshold, prevent compressor from dallying, at this time two-way pressure switch (4) disconnect, the signal output end of temperature-control amplifier (5) with
The compressor of air conditioner work request signal input part of entire car controller (3) disconnects, when air-conditioning duct pressure is higher than HVT high voltage threshold,
To prevent overheat of compressor from damaging, two-way pressure switch (4) is also disconnected at this time, and only air-conditioning duct refrigerant pressure is in defined mark
Two-way pressure switch (4) is just closed in quasi- range, at this point, the signal output end of temperature-control amplifier (5) and entire car controller (3)
Compressor of air conditioner work request signal input part is connected；
Step 4: when key is in ON grades, vehicle high pressure attachment completes preliminary filling, high pressure accessory contact device closure, while vehicle control
Device (3) processed receives compressor of air conditioner work request signal, it is believed that driver requests to open electric air-conditioning, at this time entire car controller
(3) control condenser fan relay (1) closure, condenser fan motor (2) starts running, while entire car controller (3) is defeated
Compressor of air conditioner enable signal out, the motor compressor controller control permanent magnet synchronous motor operating of motor compressor (13) are cold
Matchmaker starts to flow in air-conditioning duct；
When compressor of air conditioner work request invalidating signal, entire car controller (3) stops the enabled output of compressor, motor compressor
(13) motor compressor controller control motor compressor shuts down before the deadline, but still keeps condenser at this time
Cooling fan relay (1) closure, makes condenser fan motor (2) remain in operation, and entire car controller (3) is closed after the preset time that is delayed
Condenser fan relay control, condenser fan motor (2) shut down, guarantee to stop working in compressor of air conditioner with this
Afterwards, the pressure of air-conditioning duct can normally discharge.
Step 5: blower power supply is high level after air blower work, if PTC switch (9) is pressed at this time, switch internal contact
Conducting；Temperature detect switch (TDS) (10) is bimetallic sheet structure inside heater cores, and when PTC surface temperature is excessively high, bimetal leaf is disconnected,
If opposite PTC surface temperature is normal, connect, the PTC heating of entire car controller (3) opens request signal input terminal and receives height
Level signal then thinks driver requested unlatching PTC heating, so that PTC contactor closure bus signals are sent, request HCM control
Device is closed PTC contactor, and HCM is closed PTC contactor, and PTC starts to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501313.8A CN110271384B (en) | 2019-06-11 | 2019-06-11 | Pure electric vehicle air conditioner control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501313.8A CN110271384B (en) | 2019-06-11 | 2019-06-11 | Pure electric vehicle air conditioner control system and method |
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| CN110271384A true CN110271384A (en) | 2019-09-24 |
| CN110271384B CN110271384B (en) | 2020-07-14 |
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| CN201910501313.8A Active CN110271384B (en) | 2019-06-11 | 2019-06-11 | Pure electric vehicle air conditioner control system and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110758058A (en) * | 2019-11-28 | 2020-02-07 | 东风商用车有限公司 | PTC multiple over-temperature protection system of electric automobile |
| CN113103979A (en) * | 2021-04-13 | 2021-07-13 | 广西玉柴新能源汽车有限公司 | Power supply circuit of refrigerating unit system |
| CN113650568A (en) * | 2021-07-29 | 2021-11-16 | 东风汽车股份有限公司 | Vehicle air conditioner request signal management system |
| CN113682105A (en) * | 2021-08-27 | 2021-11-23 | 安徽江淮汽车集团股份有限公司 | Intelligent automobile cooling and heating adjusting system |
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